. >> translator: images will be sent in real time to other security agencies, where quick decisions can be made. >> reporter: the drones kept a close eye on the brazilian national team bus during last june confederation's cup, and during the match outside the stadium, the back images of street protests, looking for any trouble that could arise. the brazilian air force makes it very clear these drones won't be used with weapons. they will only be used for surveillance and reconnaissance. but it's on the ground where the biggest threats to football could occur. it was a violent street protest that nearly toppled the football tournament last year. on this day, rio's riot police are doing a simulation on how to best prepare with updated training and fancy equipment. supplemented by more boots on the ground. brazil is a country with plenty of security risks with violent crime, and there is also the potential for terrorism and cyber attacks. brazil is spending more than $1 billion on world cup security, raphael says it is too much money with too little accountability. >> translator: all discu